https://www.petmd.com/dog/emergency/common-emergencies/e_dg_artificial_respiration
Artificial Respiration for Dogs | PetMD
If your pet is not breathing, you might need to perform rescue breathing for your dog. Here are some tips for how to perform artificial respiration on your dog.
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https://www.dummies.com/article/home-auto-hobbies/pets/dogs/health-grooming/performing-artificial-respiration-and-cpr-on-your-puppy-176234/
Performing Artificial Respiration and CPR on Your Puppy | dummies
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https://www.jci.org/articles/view/100226
JCI - AN APPARATUS FOR THE PROLONGED ADMINISTRATION OF ARTIFICIAL RESPIRATION: I. A Design for...